Zero Liquid Discharge

Limited resources and serious issue of water pollution ZLD is gaining a lot of importance.

With regards to Zero Liquid Discharge (ZLD) by industries, government has already directed industries to achieve ZLD in distillery, tannery and textile units as it was mandatory that pollutants like chromium, total dissolved solid and other chemicals are separated before they are disposed of. Industries are not allowed to put up their plants, unless they have installed ZLD system.

At Sparkle, we have been an integral part of this movement, and have provided solution by treating the toughest of discharges.

For arriving at ZLD, various technologies have been employed for treating the effluent and the treated effluent by way of employing ultrafiltration and Reverse Osmosis technologies. At the final stage of ZLD solution is the challenge of evaporating the concentrated water. This is achieved with the help of multi-effect evaporators.

Sparkle ZLD system equipment is designed in such a way that it ensures easy to operate, control and install mechanism.

Technology

Micro / Membrane Filtration

Micron filtration is to segregate or separate particulate matter based on the size of the particulate matter. Sewing, screening or surface filtration are also the types of surface filtration based on size of the particulate matter.

When the requirement of filtration is less than 0.2 microns, then membrane filtration is also used. In water and waste water treatment, this type of filters are very critical. It acts as a guard filter to further membrane treatment. Micron / membrane filtration also restricts the presence of the organics, bacteria and virus.

Depth filters are the variety of filters that use a porous filtration medium to retain particles throughout the medium, rather than just on the surface of it.

These filters are commonly used when the water to be filtered contains a load of particles because, in comparison to the other types of filters, they can retain a large mass of particles before becoming clogged.

Various other technology used in water management treatment are Degasser which breaks weak carbonic acid into carbon dioxide and water. Degassed tower is considered in a DM water system or in D Alclysing system when the alcalynity in the water is very high and the pay back of degasser tower is favorable.

Nano Filtration is a stage of filtration between UF and RO where semi permeable membrane rejects high molecular weight salts. Nano filtration is essentially used for removal of hardness i.e, calcium and magnesium salts from water.

Osmosis is defined as a water with low concentration, passes through a semi permeable membrane and forms a equilibrium with water of higher concentration available on the other side of the membrane. The pressure at which this phenomenon takes place is called Osmotic Pressure.